The personnel rules and regulations adopted by the corporate authorities shall apply to all appointed officers and employees of the village, except members of citizens’ boards and commissions, the Village Manager, volunteer personnel and persons appointed to serve without pay, consultants and counsel rendering professional service and such positions involving seasonal or part-time temporary employment. If a matter is not covered within the personnel rules and regulations adopted by the corporate authorities, that matter shall be governed by the general provisions of state law governing the power of municipal governments to deal with its officers and employees.